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公开(公告)号：US10606044B2
公开(公告)日：2020-03-31
申请号：US15962509
申请日：2018-04-25
Applicant: Tamron Co., Ltd.
Inventor： Keisuke Okada
Abstract: An object of the present invention is to provide a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G1; a negative second lens group G2; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group includes convex lenses GpH and GpL satisfying predetermined conditional expressions. The convex lens GpH is the positive lens which is arranged second position or after from the object side in positive lenses in the GR group.
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公开(公告)号：US09645353B2
公开(公告)日：2017-05-09
申请号：US15050852
申请日：2016-02-23
Applicant: Tamron Co., Ltd.
Inventor： Hisayuki Yamanaka , Keisuke Okada , Takahiko Sakai , Yoshito Iwasawa
CPC classification number: G02B9/64 , G02B13/005 , G02B13/006 , G02B27/0025 , G02B27/646
Abstract: An optical system of the present invention includes, in order from an object side: a first lens group G1; a second lens group G2 having positive refractive power; and a third lens group G3 having positive refractive power, wherein the first lens group G1 and the third lens group G3 are fixed in an optical axis direction while the second lens group G2 is moved in an optical axis direction to focus on from an object at infinity to an object at a finite distance, and specified conditions is satisfied.
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公开(公告)号：US09829685B2
公开(公告)日：2017-11-28
申请号：US15044478
申请日：2016-02-16
Applicant: Tamron Co., Ltd.
Inventor： Hisayuki Yamanaka , Keisuke Okada , Yoshito Iwasawa
IPC: G02B13/02 , G02B15/14 , G02B17/00 , G02B9/12 , G02B9/14 , G02B7/02 , G02B9/64 , G02B13/00 , G02B27/00
CPC classification number: G02B13/02 , G02B9/64 , G02B13/006 , G02B27/0025
Abstract: The optical system of the present invention includes, in order from an object side: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; and a third lens group G3 having positive refractive power, wherein the first lens group G1 and the third lens group G3 are fixed in an optical axis direction, while the second lens group G2 is moved in the optical axis direction to focus on from an object at infinity to an object at a finite distance, the third lens group G3 includes, in order from the object side: an object-side group G3a; an aperture stop S; and an image-side group G3b, and a specified condition is satisfied.
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公开(公告)号：US20160238823A1
公开(公告)日：2016-08-18
申请号：US15044478
申请日：2016-02-16
Applicant: Tamron Co., Ltd.
Inventor： Hisayuki Yamanaka , Keisuke Okada , Yoshito Iwasawa
CPC classification number: G02B13/02 , G02B9/64 , G02B13/006 , G02B27/0025
Abstract: The optical system of the present invention includes, in order from an object side: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; and a third lens group G3 having positive refractive power, wherein the first lens group G1 and the third lens group G3 are fixed in an optical axis direction, while the second lens group G2 is moved in the optical axis direction to focus on from an object at infinity to an object at a finite distance, the third lens group G3 includes, in order from the object side: an object-side group G3a; an aperture stop S; and an image-side group G3b, and a specified condition is satisfied.
Abstract translation: 本发明的光学系统从物体侧依次包括具有正折射力的第一透镜组G1; 具有负屈光力的第二透镜组G2; 和具有正折射力的第三透镜组G3，其中第一透镜组G1和第三透镜组G3沿光轴方向固定，而第二透镜组G2沿光轴方向移动以从对象聚焦 在有限距离处的物体无限远地，第三透镜组G3从物体侧起依次包括物体侧组G3a; 孔径光阑S; 和图像侧组G3b，并且满足指定条件。
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公开(公告)号：US20190302432A1
公开(公告)日：2019-10-03
申请号：US16222268
申请日：2018-12-17
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa , Hisayuki Yamanaka , Keisuke Okada , Junichi Yamazoe
IPC: G02B15/177 , G02B27/64 , G02B13/18 , G02B13/02
Abstract: A zoom lens including a front group and a rear group, wherein a lens group arranged on an object side of a widest air interval at a wide-angle end is defined as the front group and a lens group arranged on an image side of the widest air interval at the wide-angle end is defined as the rear group, the front group having a negative refractive power, the rear group having a positive refractive power. Changing focal length from the wide-angle end to the telephoto end is performed by changing an air interval between the lens groups.
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Patent Agency Ranking
公开(公告)号：US20190049707A1
公开(公告)日：2019-02-14
申请号：US15962427
申请日：2018-04-25
Applicant: Tamron Co., Ltd.
Inventor： Keisuke Okada
Abstract: The present invention provides a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G1; a negative second lens group G2; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group has at least two cemented surfaces having negative refractive power, convex lenses GpH and GpL satisfying predetermined conditional expressions. An aperture stop is arranged in the first lens group or after. The zoom lens satisfies predetermined conditional expressions.
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公开(公告)号：US20190049706A1
公开(公告)日：2019-02-14
申请号：US15962509
申请日：2018-04-25
Applicant: Tamron Co., Ltd.
Inventor： Keisuke Okada
Abstract: An object of the present invention is to provide a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G1; a negative second lens group G2; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group includes convex lenses GpH and GpL satisfying predetermined conditional expressions. The convex lens GpH is the positive lens which is arranged second position or after from the object side in positive lenses in the GR group.
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公开(公告)号：US20150381863A1
公开(公告)日：2015-12-31
申请号：US14751344
申请日：2015-06-26
Applicant: Tamron Co., Ltd.
Inventor： Keisuke Okada , Shingo Abe
CPC classification number: G02B27/646 , G02B9/64 , G02B13/16 , H04N5/23209 , H04N5/23248 , H04N5/23287
Abstract: An optical system including: a first lens group Gf; a vibration control lens group Gvc; and a third lens group Gr, the first lens group Gf, the vibration control lens group Gvc, and the third lens group Gr being provided in order from an object side. The third lens group Gr has at least one lens having negative refractive power, and specified conditional expressions are satisfied.
Abstract translation: 一种光学系统，包括：第一透镜组Gf; 振动控制透镜组Gvc; 第三透镜组Gr，第一透镜组Gf，振动控制透镜组Gvc和第三透镜组Gr从物体侧开始依次设置。 第三透镜组Gr具有至少一个具有负屈光力的透镜，并且满足特定的条件表达式。
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公开(公告)号：US10935772B2
公开(公告)日：2021-03-02
申请号：US16222268
申请日：2018-12-17
Applicant: Tamron Co., Ltd.
Inventor： Yoshito Iwasawa , Hisayuki Yamanaka , Keisuke Okada , Junichi Yamazoe
IPC: G02B15/17 , G02B15/177 , G02B13/18 , G02B27/64
Abstract: A zoom lens including a front group and a rear group, wherein a lens group arranged on an object side of a widest air interval at a wide-angle end is defined as the front group and a lens group arranged on an image side of the widest air interval at the wide-angle end is defined as the rear group, the front group having a negative refractive power, the rear group having a positive refractive power. Changing focal length from the wide-angle end to the telephoto end is performed by changing an air interval between the lens groups.
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公开(公告)号：US20160252706A1
公开(公告)日：2016-09-01
申请号：US15050852
申请日：2016-02-23
Applicant: Tamron Co., Ltd.
Inventor： Hisayuki Yamanaka , Keisuke Okada , Takahiko Sakai , Yoshito Iwasawa
CPC classification number: G02B9/64 , G02B13/005 , G02B13/006 , G02B27/0025 , G02B27/646
Abstract: An optical system of the present invention includes, in order from an object side: a first lens group G1; a second lens group G2 having positive refractive power; and a third lens group G3 having positive refractive power, wherein the first lens group G1 and the third lens group G3 are fixed in an optical axis direction while the second lens group G2 is moved in an optical axis direction to focus on from an object at infinity to an object at a finite distance, and specified conditions is satisfied.
Abstract translation: 本发明的光学系统从物体侧起依次包括：第一透镜组G1; 具有正折射力的第二透镜组G2; 和具有正折光力的第三透镜组G3，其中第一透镜组G1和第三透镜组G3在光轴方向上固定，而第二透镜组G2沿光轴方向移动以从物体聚焦 无限远到有限距离的物体，并且满足指定的条件。
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